First Principles Thinking: preparation versus competition while employed
A is correct. Standard IV(A) permits members and candidates to prepare to enter a competing business before termination, provided they do not solicit clients, do not use firm property, and continue to perform their current duties. Karthik's preparations are off-hours, use no firm resources, and involve no client contact, so the duty of loyalty remains intact.
B confuses the notification and consent rule that applies to rendering independent services during employment with purely preparatory activity. Notification is required when the member plans to provide services in an independent business while still employed, not for an after-employment venture that has not yet begun.
C misreads Handbook guidance in which the registration of a competing entity with regulators is expressly treated as acceptable preparation as long as no clients are pursued and the member's regular duties are fulfilled.